The Londonderry sifter. (South Londonderry, Vt.) 1883-19??, 1887-07-14
SCIENTIFIC AND INDUSTRIAL.

cat each equinox" says an astr0no-
mer, "there are about 10s hours that
both poles have simultaneous view of the
sun or part of it; and for thirty-four
hours the whole of its disc is visible to
both.
Cotton has been successfully intro
duced into three districts Of the Cau-
easus, and extensive plantations are to
be established in the vicinity of Erivan.
The Caucasian Agricultural Society will
send agents to study the American sys'
'em of culture.
An English mineralogist, Mr., Bryce
Wright, gives the prices of iron in the
form of meteorites as from S15 or $50 a
pound to as much as $50 an ounce. Some
of the Russian meteorites are worth $50
to $50 an ounce, and the prices generally
have trebled in the last few years
By experiments on dogs, NJ. Il. Quin'
quad finds that cold bath increases ten
fold the rate of consumption of oxygen,
double or treble the quantity of air passed
through the lungs, augment the amount
of carbonic acid expelled, and very much
increase the respiratory combustions and
the production of blood-sugar. Hot
baths have like influence, but in less
aegrec.
Experiments are believed to show tina,
aseptol, or orthopenot- sulphate, is des-
tined to take the place of carbolic acid
as disinfectant and antiseptic. 1t is a
syrupy, brown fluid of aromatic odor,
and soluble in alcohol, glycerine, and wa
ter, and is not irritating in as strong as
10 per cent. solutions. As an antiseptic
it is said to equal carbolic acid, while pos
sessing also the advantage of pleasantcr
ador, more solubility, etc.
DR.. r. W. Raymond lately called at
tention to the reputed connection be-
tween certain plants and metals in the
underlying soil. Thus zinc violet or
Galmeiceilchea, sometimes regarded as
distinct species under the name of pi2-
In ACKNOWLEDGEMENTS out the hills
containing calamine, or ENCORE, in
Rhenish Prussia and Belgium. The lead
plant, Am0rpha eanescens is believed by
American miners to grow only in locali-
lies containing galena, and Eriogonum
wdlyolium is probably destined to be
known in the west as the silver plant.
Careful experiments on the sense OF
imell in dogs have been made by George
]. Romanes, who has communicated the
results to the Linnean Society of Lon
don. He finds that not only the feet but
thc whole body of man exhale peculiar
Or individual odor, which dog can rec
,gnize as that of his master amid a
.rowd of other persons; that the
Individual quality of this odor can be rec
,gnized at great distances to windward, or
N calm weather at great distances in any
Erection; and that even powerful per
tumes may not overcome this odor. Yet
single sheet of brown paper, when
stepped upon instead of the ground, and
ifterward removed, was sufficient to pre-
rent Mr.. Romanes' dog from following
lis trail.
Heights, under the equator, from the
,ea to the level of 16, 200 feet-that of
perpetual snow-are divided by Meyer
INTO eight zones or regions, which he
names from the characteristic plants: /,
palms and bananas, beginning at sea-
evel; 2, tree ferns and frs, at 1000 feet
3, myrtles and laurels, 1850 feet; 4,
evergreen dicotyledonous trees, 6,12O
feet; 8, European dicotyledonous trees,
800 feet; 6, pines, 10, 14O feet: ?, rho
lodendrons, 12, $50 feet; 8, Alpine
plants, IA, ITO feet. The corresponding
zones in latitude, at sea-level, are: l,
equatorial, latitude 0 degrees-15 de
grees; 2, tropical, Is degrees-23 de
grees; 3, sub-tropical, % degrees-34
degrees, 4, warm-temperatc, "a degrees
40 degrees-5s degrees; 8, sub-arctic
So degrees-66 degrees; 7, arctic, &c
degrees-7s degrees: s, polar, rs de
grees-sS degrees. Beyond SO degrees
vegetation is supposed to be lacking.